function checkTextfieldOfNr(obj){
	if(isNaN(obj.value)){
		obj.value = "";
	}	
}

function notepad(){
	this.nrEntries = 0;
}
notepad.prototype.mouseOver = function(){
	if(notepad.nrEntries > 0){
		document.getElementById('notepadList').style.display = 'block';
		document.getElementById('notepadListEnd').style.display = 'block';
	}
}
notepad.prototype.mouseOut = function(){
	if(notepad.nrEntries > 0){
		document.getElementById('notepadList').style.display = 'none';
		document.getElementById('notepadListEnd').style.display = 'none';
	}
}

var notepad = new notepad();